nd6.h revision 1.35
1 /* $NetBSD: nd6.h,v 1.35 2003/06/27 08:41:08 itojun Exp $ */ 2 /* $KAME: nd6.h,v 1.95 2002/06/08 11:31:06 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef _NETINET6_ND6_H_ 34 #define _NETINET6_ND6_H_ 35 36 /* see net/route.h, or net/if_inarp.h */ 37 #ifndef RTF_ANNOUNCE 38 #define RTF_ANNOUNCE RTF_PROTO2 39 #endif 40 41 #include <sys/queue.h> 42 #include <sys/callout.h> 43 44 struct llinfo_nd6 { 45 struct llinfo_nd6 *ln_next; 46 struct llinfo_nd6 *ln_prev; 47 struct rtentry *ln_rt; 48 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 49 long ln_asked; /* number of queries already sent for this addr */ 50 u_long ln_expire; /* lifetime for NDP state transition */ 51 short ln_state; /* reachability state */ 52 short ln_router; /* 2^0: ND6 router bit */ 53 int ln_byhint; /* # of times we made it reachable by UL hint */ 54 55 long ln_ntick; 56 struct callout ln_timer_ch; 57 }; 58 59 #define ND6_LLINFO_NOSTATE -2 60 /* 61 * We don't need the WAITDELETE state any more, but we keep the definition 62 * in a comment line instead of removing it. This is necessary to avoid 63 * unintentionally reusing the value for another purpose, which might 64 * affect backward compatibility with old applications. 65 * (20000711 jinmei (at) kame.net) 66 */ 67 /* #define ND6_LLINFO_WAITDELETE -1 */ 68 #define ND6_LLINFO_INCOMPLETE 0 69 #define ND6_LLINFO_REACHABLE 1 70 #define ND6_LLINFO_STALE 2 71 #define ND6_LLINFO_DELAY 3 72 #define ND6_LLINFO_PROBE 4 73 74 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 75 #define ND6_LLINFO_PERMANENT(n) ((n)->ln_expire == 0) 76 77 struct nd_ifinfo { 78 u_int32_t linkmtu; /* LinkMTU */ 79 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 80 u_int32_t basereachable; /* BaseReachableTime */ 81 u_int32_t reachable; /* Reachable Time */ 82 u_int32_t retrans; /* Retrans Timer */ 83 u_int32_t flags; /* Flags */ 84 int recalctm; /* BaseReacable re-calculation timer */ 85 u_int8_t chlim; /* CurHopLimit */ 86 u_int8_t initialized; /* Flag to see the entry is initialized */ 87 /* the following 3 members are for privacy extension for addrconf */ 88 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 89 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 90 u_int8_t randomid[8]; /* current random ID */ 91 }; 92 93 #define ND6_IFF_PERFORMNUD 0x1 94 #define ND6_IFF_ACCEPT_RTADV 0x2 95 96 #ifdef _KERNEL 97 #define ND_IFINFO(ifp) \ 98 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 99 #define IN6_LINKMTU(ifp) \ 100 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ 101 ? ND_IFINFO(ifp)->linkmtu \ 102 : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \ 103 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)) 104 #endif 105 106 struct in6_nbrinfo { 107 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 108 struct in6_addr addr; /* IPv6 address of the neighbor */ 109 long asked; /* number of queries already sent for this addr */ 110 int isrouter; /* if it acts as a router */ 111 int state; /* reachability state */ 112 int expire; /* lifetime for NDP state transition */ 113 }; 114 115 #define DRLSTSIZ 10 116 #define PRLSTSIZ 10 117 struct in6_drlist { 118 char ifname[IFNAMSIZ]; 119 struct { 120 struct in6_addr rtaddr; 121 u_char flags; 122 u_short rtlifetime; 123 u_long expire; 124 u_short if_index; 125 } defrouter[DRLSTSIZ]; 126 }; 127 128 struct in6_defrouter { 129 struct sockaddr_in6 rtaddr; 130 u_char flags; 131 u_short rtlifetime; 132 u_long expire; 133 u_short if_index; 134 }; 135 136 #ifdef _KERNEL 137 struct in6_oprlist { 138 char ifname[IFNAMSIZ]; 139 struct { 140 struct in6_addr prefix; 141 struct prf_ra raflags; 142 u_char prefixlen; 143 u_char origin; 144 u_long vltime; 145 u_long pltime; 146 u_long expire; 147 u_short if_index; 148 u_short advrtrs; /* number of advertisement routers */ 149 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 150 } prefix[PRLSTSIZ]; 151 }; 152 #endif 153 154 struct in6_prlist { 155 char ifname[IFNAMSIZ]; 156 struct { 157 struct in6_addr prefix; 158 struct prf_ra raflags; 159 u_char prefixlen; 160 u_char origin; 161 u_int32_t vltime; 162 u_int32_t pltime; 163 time_t expire; 164 u_short if_index; 165 u_short advrtrs; /* number of advertisement routers */ 166 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 167 } prefix[PRLSTSIZ]; 168 }; 169 170 struct in6_prefix { 171 struct sockaddr_in6 prefix; 172 struct prf_ra raflags; 173 u_char prefixlen; 174 u_char origin; 175 u_int32_t vltime; 176 u_int32_t pltime; 177 time_t expire; 178 u_int32_t flags; 179 int refcnt; 180 u_short if_index; 181 u_short advrtrs; /* number of advertisement routers */ 182 /* struct sockaddr_in6 advrtr[] */ 183 }; 184 185 #ifdef _KERNEL 186 struct in6_ondireq { 187 char ifname[IFNAMSIZ]; 188 struct { 189 u_int32_t linkmtu; /* LinkMTU */ 190 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 191 u_int32_t basereachable; /* BaseReachableTime */ 192 u_int32_t reachable; /* Reachable Time */ 193 u_int32_t retrans; /* Retrans Timer */ 194 u_int32_t flags; /* Flags */ 195 int recalctm; /* BaseReacable re-calculation timer */ 196 u_int8_t chlim; /* CurHopLimit */ 197 u_int8_t receivedra; 198 } ndi; 199 }; 200 #endif 201 202 struct in6_ndireq { 203 char ifname[IFNAMSIZ]; 204 struct nd_ifinfo ndi; 205 }; 206 207 struct in6_ndifreq { 208 char ifname[IFNAMSIZ]; 209 u_long ifindex; 210 }; 211 212 /* Prefix status */ 213 #define NDPRF_ONLINK 0x1 214 #define NDPRF_DETACHED 0x2 215 #define NDPRF_HOME 0x4 216 217 /* protocol constants */ 218 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 219 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 220 #define MAX_RTR_SOLICITATIONS 3 221 222 #define ND6_INFINITE_LIFETIME 0xffffffff 223 224 #ifdef _KERNEL 225 /* node constants */ 226 #define MAX_REACHABLE_TIME 3600000 /* msec */ 227 #define REACHABLE_TIME 30000 /* msec */ 228 #define RETRANS_TIMER 1000 /* msec */ 229 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 230 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 231 #define ND_COMPUTE_RTIME(x) \ 232 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \ 233 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 234 235 TAILQ_HEAD(nd_drhead, nd_defrouter); 236 struct nd_defrouter { 237 TAILQ_ENTRY(nd_defrouter) dr_entry; 238 struct in6_addr rtaddr; 239 u_char flags; /* flags on RA message */ 240 u_short rtlifetime; 241 u_long expire; 242 struct ifnet *ifp; 243 int installed; /* is installed into kernel routing table */ 244 }; 245 246 struct nd_prefix { 247 struct ifnet *ndpr_ifp; 248 LIST_ENTRY(nd_prefix) ndpr_entry; 249 struct sockaddr_in6 ndpr_prefix; /* prefix */ 250 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 251 252 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 253 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 254 255 time_t ndpr_expire; /* expiration time of the prefix */ 256 time_t ndpr_preferred; /* preferred time of the prefix */ 257 time_t ndpr_lastupdate; /* reception time of last advertisement */ 258 259 struct prf_ra ndpr_flags; 260 u_int32_t ndpr_stateflags; /* actual state flags */ 261 /* list of routers that advertise the prefix: */ 262 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 263 u_char ndpr_plen; 264 int ndpr_refcnt; /* reference couter from addresses */ 265 }; 266 267 #define ndpr_next ndpr_entry.le_next 268 269 #define ndpr_raf ndpr_flags 270 #define ndpr_raf_onlink ndpr_flags.onlink 271 #define ndpr_raf_auto ndpr_flags.autonomous 272 #define ndpr_raf_router ndpr_flags.router 273 274 /* 275 * Message format for use in obtaining information about prefixes 276 * from inet6 sysctl function 277 */ 278 struct inet6_ndpr_msghdr { 279 u_short inpm_msglen; /* to skip over non-understood messages */ 280 u_char inpm_version; /* future binary compatibility */ 281 u_char inpm_type; /* message type */ 282 struct in6_addr inpm_prefix; 283 u_long prm_vltim; 284 u_long prm_pltime; 285 u_long prm_expire; 286 u_long prm_preferred; 287 struct in6_prflags prm_flags; 288 u_short prm_index; /* index for associated ifp */ 289 u_char prm_plen; /* length of prefix in bits */ 290 }; 291 292 #define prm_raf_onlink prm_flags.prf_ra.onlink 293 #define prm_raf_auto prm_flags.prf_ra.autonomous 294 295 #define prm_statef_onlink prm_flags.prf_state.onlink 296 297 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 298 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 299 300 struct nd_pfxrouter { 301 LIST_ENTRY(nd_pfxrouter) pfr_entry; 302 #define pfr_next pfr_entry.le_next 303 struct nd_defrouter *router; 304 }; 305 306 LIST_HEAD(nd_prhead, nd_prefix); 307 308 #include <sys/mallocvar.h> 309 MALLOC_DECLARE(M_IP6NDP); 310 311 /* nd6.c */ 312 extern int nd6_prune; 313 extern int nd6_delay; 314 extern int nd6_umaxtries; 315 extern int nd6_mmaxtries; 316 extern int nd6_useloopback; 317 extern int nd6_maxnudhint; 318 extern int nd6_gctimer; 319 extern struct llinfo_nd6 llinfo_nd6; 320 extern struct nd_drhead nd_defrouter; 321 extern struct nd_prhead nd_prefix; 322 extern int nd6_debug; 323 324 #define nd6log(x) do { if (nd6_debug) log x; } while (/*CONSTCOND*/ 0) 325 326 extern struct callout nd6_timer_ch; 327 328 /* nd6_rtr.c */ 329 extern int nd6_defifindex; 330 331 union nd_opts { 332 struct nd_opt_hdr *nd_opt_array[8]; 333 struct { 334 struct nd_opt_hdr *zero; 335 struct nd_opt_hdr *src_lladdr; 336 struct nd_opt_hdr *tgt_lladdr; 337 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 338 struct nd_opt_rd_hdr *rh; 339 struct nd_opt_mtu *mtu; 340 struct nd_opt_hdr *search; /* multiple opts */ 341 struct nd_opt_hdr *last; /* multiple opts */ 342 int done; 343 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 344 } nd_opt_each; 345 }; 346 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 347 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 348 #define nd_opts_pi nd_opt_each.pi_beg 349 #define nd_opts_pi_end nd_opt_each.pi_end 350 #define nd_opts_rh nd_opt_each.rh 351 #define nd_opts_mtu nd_opt_each.mtu 352 #define nd_opts_search nd_opt_each.search 353 #define nd_opts_last nd_opt_each.last 354 #define nd_opts_done nd_opt_each.done 355 356 /* XXX: need nd6_var.h?? */ 357 /* nd6.c */ 358 void nd6_init __P((void)); 359 struct nd_ifinfo *nd6_ifattach __P((struct ifnet *)); 360 void nd6_ifdetach __P((struct nd_ifinfo *)); 361 int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *)); 362 void nd6_option_init __P((void *, int, union nd_opts *)); 363 struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 364 int nd6_options __P((union nd_opts *)); 365 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 366 void nd6_setmtu __P((struct ifnet *)); 367 void nd6_llinfo_settimer __P((struct llinfo_nd6 *, long)); 368 void nd6_timer __P((void *)); 369 void nd6_purge __P((struct ifnet *)); 370 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int)); 371 int nd6_resolve __P((struct ifnet *, struct rtentry *, 372 struct mbuf *, struct sockaddr *, u_char *)); 373 void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 374 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 375 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 376 char *, int, int, int)); 377 int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *, 378 struct sockaddr_in6 *, struct rtentry *)); 379 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, 380 struct sockaddr *, u_char *)); 381 int nd6_sysctl __P((int, void *, size_t *, void *, size_t)); 382 int nd6_need_cache __P((struct ifnet *)); 383 384 /* nd6_nbr.c */ 385 void nd6_na_input __P((struct mbuf *, int, int)); 386 void nd6_na_output __P((struct ifnet *, const struct in6_addr *, 387 const struct in6_addr *, u_long, int, struct sockaddr *)); 388 void nd6_ns_input __P((struct mbuf *, int, int)); 389 void nd6_ns_output __P((struct ifnet *, const struct in6_addr *, 390 const struct in6_addr *, struct llinfo_nd6 *, int)); 391 caddr_t nd6_ifptomac __P((struct ifnet *)); 392 void nd6_dad_start __P((struct ifaddr *, int *)); 393 void nd6_dad_stop __P((struct ifaddr *)); 394 void nd6_dad_duplicated __P((struct ifaddr *)); 395 396 /* nd6_rtr.c */ 397 void nd6_rs_input __P((struct mbuf *, int, int)); 398 void nd6_ra_input __P((struct mbuf *, int, int)); 399 void prelist_del __P((struct nd_prefix *)); 400 void defrouter_addreq __P((struct nd_defrouter *)); 401 void defrouter_reset __P((void)); 402 void defrouter_select __P((void)); 403 void defrtrlist_del __P((struct nd_defrouter *)); 404 void prelist_remove __P((struct nd_prefix *)); 405 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, 406 struct mbuf *)); 407 int nd6_prelist_add __P((struct nd_prefix *, struct nd_defrouter *, 408 struct nd_prefix **)); 409 int nd6_prefix_onlink __P((struct nd_prefix *)); 410 int nd6_prefix_offlink __P((struct nd_prefix *)); 411 void pfxlist_onlink_check __P((void)); 412 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, struct ifnet *)); 413 struct nd_prefix *nd6_prefix_lookup __P((struct nd_prefix *)); 414 int in6_ifdel __P((struct ifnet *, struct in6_addr *)); 415 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); 416 void rt6_flush __P((struct in6_addr *, struct ifnet *)); 417 int nd6_setdefaultiface __P((int)); 418 419 #endif /* _KERNEL */ 420 421 #endif /* _NETINET6_ND6_H_ */ 422
Indexes created Fri Sep 26 20:09:58 GMT 2025